package cn.anquing.pattern.interpreterPattern.expression;

public abstract class SymbolExpression extends Expression{

    protected Expression left;

    protected Expression right;

    //所有的解析公式都应只关心自己左右两个表达式的结果
    public SymbolExpression(Expression _left,Expression _right){
        this.left = _left;
        this.right = _right;
    }
}
